I only load 180s in one of my 300s so its a small sample. This rifle, a 1939G, really likes 180g Win Silver tips and IMR 4895 as well as one Win 748 load. I know, Silver tips don't help anyone. The other 180g load this rifle liked is the 180g Speer RN with IMR 3031. All of these chronograph in the 2200fps area; a little more with 4895 and a little less with 3031.
In this rifle, accuracy was best with the 180s over all others and the 180s were the only loads to register single digit standard deviations which happened multiple times. Groups were shot with a tang sight off of a bench at 100 yards against a bull. Accuracy with 180s averaged 1.8in for all loads in that weight. Average velocity for all 180g loads tested was 2255fps, 165g loads tested was 2385, and 150g loads tested was 2527fps.
There it is, a sample of 1...
Last edited by Centennial; 07/08/21.
